Adhesive joint.



' UNITED STATES PATENT OFFICE.

CHARLES C. BLAKE, OF BROOKLINE, MASSACHUSETTS, ASSIGNOR T0 C. C. BLKE, INCORPORATED, OF BOSTON, MASSACHUSETTS, A CORPORATION OF NEW YORK.

ADHESIVE JOINT.

Specification of Letters Patent.

YPatented Nov. 12, 1918.

Application led September 4, 1915. Serial No. 48,996.

To all whom it may concern.'

Be it known that l, (Juanma (l. Iliana, a citizen ot'4 the United States. residing at Brookline, in the county of Norfolk and State of Massachusetts, have invented a new and useful Iml'n'ovenlent in Adhesive Jointsl of which the following is a specification.

The present invention relates to adhesive joints by means of which separate pieces of material arc connected, and vmore particularly to adhesive joints which are used in the manufacture of boots and shoes for securing the lasted upper to the insole.

ln the method ot' lasting .shoes devised by nie the npdrawn upper is secured by cement to the edge face of the insole. To accomplish this operation the insole blank is iirst groored aloner its edge and this groove is titled with jewelers cement, seal-- ing wax or some other of the well known adhesives which are normally non-adhcsive under ordinary conditions ot temperature but which are rendered taclly` by heat. E1nbedded in this adhesive lilliug is a line electric wire which has a heat-producing resistance. After the upper has been updrawn and held under pressure against the edge face of the insole a current of electricity is passed through the wire which becomes red hot thus melting the adhesive and thereby eli'ecting the attachment of the lasted upper to the insole.

rlfhe object of the invention is to simplify and improve the `method of preparing the insole for the joining operation by obviating the grooving of the edge of the insole to hold the adhesive and by effecting an economy in the use ot' the adhesive.

To thel accomplishment of this object, and the production of a novel insole. the features of the present invention consist in certain methods, devices. combinations and varrangements of parts fully set forth herein after, the advantages of which will he readily understood by those skilled in the art.

The various features of the present invention will be readily understood from an in'- spection of the accompanying drawings, in which,

Figure 1 is a plan of an insole on a last showing the manner in which the tubular fabric covered Wire passes through an adhesive bath, is stripped of snpertluous adhesive, and is secured to the edge face of the insole;

Fig. 2 is a side elevation; and

Fig. il is a detail showing the tubular t'al'irie covered wire.

ln thi` illustrated embodiment of the in` vention the ineniher to be prcliarcd for the joining operation coml'n'ises an insole 1 cured to the bottoni ot a last The carrier for the adhesive comprises a tubular fabric cover l which incloses an electric wire 4 having a heat-tuoducing resistance. The cover l is produced by braiding or Wea ving over the wire 4.

Preferably the last J is mounted to more longitudinally and rotate in order to transt'er the point olLI operation of an attaching tool 5 along the edge tace ot the insole. As the last is fed the braid-covered Wire is drawn from a suitable source ot' supply through an in.-|.ilating adhesive bath 6 which is suitably heated to maintain the adhesive in a liquid condition. The braid-covered Wire enters the bath through a hole 7 (Fig. 2), then passes under a grid 8 arranged beneath the surface of the adhesive`y over a second grid 9. and beneath a third grid 10. 'The adhesive-corered braid then passes through a frusto-conical throat 11 which stripsV the braid of superfluous adhesive. The braitd-covered Wire is then lcd to the at taehing tool The attaching tool 5 is provided with a lip 12 for engagen'ient with the bottom of the insole on the last and with a lip 13 for engagement with the edge face of the insole. The lips 12 and 13 are held pressed against the bottom and edge face of the, insole respectively by springs 14 and 15. The

.attaching tool 5 is slightly heated by anrelectric heater 1G to facilitate the attachment of the adl'iesi\'ecoated braid to the edge face ol' the insole. The conibination of heat and pressure on the tool 5 places the braid in a flattened condition upon the edge face of the insole.

lith this method the insole is prepared for the lasting operation without a prelimina ry edg^groovi1ig operation. Furthermore the braid carries the proper amount of ad` hesive to make a good joint between the upper and insole. Obviously an important economy in the manufacture of the type of welt shoes devised by me is eected.

While the illustrated embodiment of the method for preparing 'the insole of a Welt.

shoe for the lasting operation itis not t0 be understood as limiting the scope of the claims, where the context otherwise permits, to the exclusive ractice of this method in the manufacture otP shoes, as it will be apparent to those skilled in this and other arts that the methods herein disclosed may be advantageously employed in preparing many kinds of materials for a joining operation.

What is claimed as new, is

1. That improvement in the art of pref paring a member for a joining operation which consists in embedding a Wire in a fabric cover, coating the fabric with an adhesive which is normally non-adhesive but which is rendered tacky under the influence Vof heat, and securing the coated fabric to the member, substantially as described.

2. That improvement in the art of pre aring a member for a joining operation which consists in embedding awire in a fabric cover, coating the fabric with an insulating adhesive which is normally non-adhesive but which is rendered tacky under the influence of heat, and securing the coated fabric to the member, substantially as described.

3. That improvement in the art of pre aring a member for a joining operation wiiich consists in braidin over a wire, coating the braid with an ahesive, and'securing the coated braid under pressure to the member, substantially as described.

4. That improvement in the art of preparing a member for a 'oining operation which consists in embeddin a wire in a braided cover, coating the abric with an adhesive and securing the coated fabric under heat and pressure to the member, substantially as described.

. That improvement in the art of preparing a member for a joining operation-which consists in embedding' a wire in a braided cover, passing the fabric through an aclhesive bath and securing the coated fabric tothe member, substantiallyl as described.

6. That improvement in t e art of preparing a member for a joining operation w ich consists in embedding a wire in a braided cover, passing the fabric through an adhesive bath, stripping the fabric of superfluous adhesive, and securing the fabric to the member under heat and pressure, substantially as described.

7. That improvement in the art of preparing a member for a joining operation which consists in embedding` in wire in a tubular fabric cover, coating `the fabric with an adhesve which is normally non-adhesive but which is rendered tack of heat, and securin the coated fabric to the member, substantially as described.

8. In combination, two members having interposed therebetween a fabric having an adhesive coatin which is normally non-ad hesive but whic is rendered tacky under the influence of heat thereon and a thermal conductor therein, substantially as described.

9; A sole having a wire embedded in an adhesive-coated tubular fabric secured to the edge face thereof, substantially as'described.

10. An assembled shoe, having, in combination, a sole and an upper having interposed therebetween a tubular fabric cover aving an adhesive coatingr` thereon and a wire therein, substantially as described.

11. In combination, two members having interposed therebetween a thermal conductor, covered with an adhesive-coated tubular fabric, said adhesive being normally 'nonadhesive but rendered tacky under the influence of heat, substantially as described.

l2. In combination, two members having interposed therebetween a thermal conductor, having an adhesive-coated, flattened, tubular cover, said adhesive being normally non-adhesive but rendered tacky under the iniuence of heat, substantially as described.

13. In combination, two members having interposed therebetween a thermal conductor having an adhesive-coated, iiattened, tubular, braided cover, said adhesive being normall non-adhesive but rendered tacky under the influence of heat, substantially as de scribed.

CHARLES c. BLAKE.

y under the influence' Correctinns in Letters Patent No. 1,284,862.

It is hereby certified Limi in Lettura Patent, Nn. 13H56?, granted Novmnbnr i2, 1918, upon the application if Cimrius Binlw, of Inmikiinr, Alassnrhnsr-IIH.

for an improvement in Afliwsiw Joints," vrrors :Immuin ine print-cd spnliGntion requiring correction as fniiow: Page 2, linrs IW, fl?. l, f'inirns 4, .5, and 1', for

the word braided" rend fabula fabric; sume lingo, iiml 5G. claim 7, for the wurd in read a; and thntthe Suid Luthers Palcnt should im remi wiin those corrections therein that. the same may conform to the, record of' the anse in the Patent Ofirc.

Signed and sealed this 11th luy n( Murr-h, A. D., 19H).

{SEAL} R if. WHI'IICI'IEAD.

siding f 'nwmissioner ofPatf/nls. 

